消息中间件系列教程（15） -RabbitMQ-基于全局消息ID解决幂等性问题

@Component
public class FanoutProducer {
    @Autowired
    private AmqpTemplate amqpTemplate;
    /*public void send(String queueName) {
        String msg = "my_fanout_msg:" + new Date();
        System.out.println(msg + ":" + msg);
        amqpTemplate.convertAndSend(queueName, msg);
    }*/
    public void send(String queueName) {
        String msg = "my_fanout_msg:" + System.currentTimeMillis();
        Message message = MessageBuilder.withBody(msg.getBytes()).setContentType(MessageProperties.CONTENT_TYPE_JSON)
                .setContentEncoding("utf-8").setMessageId(UUID.randomUUID() + "").build();
        System.out.println(msg + ":" + msg);
        amqpTemplate.convertAndSend(queueName, message);
    }
}

@Component
public class FanoutSmsConsumer {
    @RabbitListener(queues = "fanout_sms_queue")
    public void process(Message message) throws Exception {
        String messageId = message.getMessageProperties().getMessageId();
        System.out
                .println(Thread.currentThread().getName() + ",邮件消费者获取生产者消息msg:" + new String(message.getBody(), "UTF-8")
                        + ",messageId:" + messageId);
        /*if(hasFinished(messageId)){
            //如果消息处理完了，则直接完成，不消费信息
            return;
        }*/
    }
}